Thanks for the feedback. We did change the way that feature looks slightly, but you should still have the option to drag your finger over the elevation profile to get an approximate location and distance for the trail on the map.
In order to access this feature, click on the trail on the map. You should then see a trail card pop up at the bottom of the page for that particular trail. In the bottom right hand corner of the card, there is a mountain icon. Click on this to display the elevation profile for the entire trail. Once you have the elevation profile up, you should be able to drag your finger along the profile and see the corresponding location and mileage on on the trail on the map. It no longer has a dot, but you will have a small pop-up with the mileage, elevation and grade.
Totally agree, this was one of the defining/stand-out features of the app and I really think you guys should bring it back. The new way of locating your position on the profile map is clunky and dumb and not something one can quickly do while checking the app on a run. Overall, this most recent update seems like a step in the wrong direction for the app's usefulness, but if you are going to do one thing, PLEASE BRING BACK THIS FEATURE!